A constitutional monarchy (also known as a parliamentary monarchy) is a form of monarchy in which the sovereign exercises their authorities in accordance with a written or unwritten constitution. Constitutional monarchy differs from absolute monarchy (in which a monarch holds absolute power), in that constitutional monarchs are bound to exercise their powers and authorities within the limits prescribed within an established legal framework. Constitutional monarchies range from countries such as Morocco, where the constitution grants substantial discretionary powers to the sovereign, to countries such as Sweden or Denmark where the monarch retains very few formal authorities.
The oldest constitutional monarchy dating back to ancient times was that of the Hittites. They were an ancient Anatolian people that lived during the Bronze Age whose king or queen had to share their authority with an assembly, called Panku, equivalent to a modern-day deliberative assembly of a legislature. These were scattered noble families that worked as representatives of their subjects in an adjutant or subaltern federal-type landscape.